SURF products

Distributed buoyancy design, engineering and materials

The densities and composition of the modules are based on operational requirements such as hydrostatic pressure, uplift, water ingress, riser diameter, length, etc.


However, the main elements of the modules comprise microspheres and macrospheres encapsulated in a polymer syntactic foam matrix.

In higher temperature applications the buoyancy modules can incorporate convection channels.

Operating what is probably the most advanced buoyancy manufacturing plant in the industry, Balmoral provides very high quality, consistent modules which result in low water absorption and compression throughout their service life.


Balmoral distributed buoyancy cross section

Distributed buoyancy module cross section


External finishing

BOE provides finishing options of rotationally moulded polyethylene, polyurethane elastomer or GRE external skins which offer the following benefits:

  • Abrasion and impact resistance
  • Enhanced water ingress performance
  • Marine growth resistance
  • High-visibility pigmentation
  • Customised graphics option


Balmoral distributed buoyancy modules being loaded onto vessels at Aberdeen Harbour


Next: Clamping options